Does the SparkFun board for the Teensy 4.1 provide access to what is on the back of the Teensy board?
Please refer to the photos here https://www.sparkfun.com/products/16771 which show the pin layout from several angles 
Does the SparkFun board for the Teensy 4.1 provide access to what is on the back of the Teensy board?
Please refer to the photos here https://www.sparkfun.com/products/16771 which show the pin layout from several angles